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NOX Issue

gmilton66

New Member
Joined
Apr 9, 2025
Messages
3
Location
Airdrie
Car
GLC 250cdi
Good afternoon,

New user here looking for some advice on NOX sensor fault
Car went in for service and MOT on Friday 4th April on collection I was told EML had came on but they reset to pass MOT, this was an old message that was stored ? Told to drive on motorway at 60 to 70 miles an hour for regen ? If light came back on a new sensor would be required at £700
Software update was carried out whilst car was being serviced
Car is a 2017 GLC 250 diesel, 77k, full MBSH including MOT’s, never had EML on
Any advice on whether I have any recourse with Mercedes would be appreciated
 
Good afternoon,

New user here looking for some advice on NOX sensor fault
Car went in for service and MOT on Friday 4th April on collection I was told EML had came on but they reset to pass MOT, this was an old message that was stored ? Told to drive on motorway at 60 to 70 miles an hour for regen ? If light came back on a new sensor would be required at £700
Software update was carried out whilst car was being serviced
Car is a 2017 GLC 250 diesel, 77k, full MBSH including MOT’s, never had EML on
Any advice on whether I have any recourse with Mercedes would be appreciated
Welcome to the forum.
I'm afraid that the software update is more than likely responsible for the nox sensor issue.
A quick search brings up these threads which is the sorry story for many after the update.

 
Thank you for your reply, I will go and speak to Mercedes Glasgow now that I have some more information
 

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